基于热重分析的菱镁矿分解动力学解析
Decomposition kinetics of magnesite deduced from thermogravimetric analysis
查看参考文献24篇
|
文摘
|
本文利用热重(TG)分析方法,探讨了菱镁矿的热分解过程。根据热微商(DTG)曲线峰顶温度,结合Kissinger及Ozawa-Doyle方法拟合计算得到菱镁矿热分解的活化能和指前因子(lgA)分别为211.55 kJ/mol和11.07 s~(-1)。依次采用单曲线拟合、多元非线性拟合及Malek方法判定得出菱镁矿热分解过程属于三维相界反应模型(R3),其动力学方程为: dα/dT=(10~(11.07)/β)·e~(-211.55×10~3/(8.314×T))·3(1-α)~(2/3)。 |
|
其他语种文摘
|
Decomposition kinetics of magnesite was investigated by using thermogravimetric (TG) analysis. The activation energy (E) and pre-exponential factor (lgA) were calculated from Kissinger and Ozawa-Doyle equations, and the peak value of derivative thermogravimetry (DTG) data was used as the maximum temperature. The calculated E and lgA were 211.55 kJ/mol and 11.07 s~(-1), respectively. The reaction mechanism was further discussed by using single-TG curve, multivariate no-linear regressions and Malek method, respectively. The obtained results indicate that the reaction was a three-dimensional phase boundary reaction (R3). The kinetic equation was as follows: dα/dT=(10~(11.07)/β)·e~(-211.55×10~3/(8.314×T))·3(1-α)~(2/3). |
|
来源
|
岩石矿物学杂志
,2014,33(2):391-396 【核心库】
|
|
关键词
|
菱镁矿
;
热重分析
;
分解动力学
;
机理函数1
|
|
地址
|
中国科学院广州地球化学研究所, 广东, 广州, 510640
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-6524 |
|
学科
|
地质学 |
|
基金
|
国家自然科学基金
;
广东省自然科学基金
;
佛山市院市合作项目
|
|
文献收藏号
|
CSCD:5104097
|
参考文献 共
24
共2页
|
|
1.
Birchal V S S. The effect of magnesite calcination conditions on magnesia hydration.
Minerals Engineering,2000,13(14/15):1629-1633
|
被引
28
次
|
|
|
|
|
2.
Boris V. Mechanism and kinetics of thermal decomposition of carbonates.
Thermochimica Acta,2002,386:1-16
|
被引
2
次
|
|
|
|
|
3.
Demir F. Optimization of the dissolution of magnesite in citric acid solutions.
International Journal of Mineral Processing,2008,87:60-64
|
被引
10
次
|
|
|
|
|
4.
Demir F. Calcination kinetic of magnesite from thermogravimetric data.
Chemical Engineering Research and Design,2003,81:618-622
|
被引
6
次
|
|
|
|
|
5.
Jesenak V. Kinetic analysis of thermal decopostion of magesite-influence of generated defects and their annealing.
Journal of Thermal Analysis and Calorimetry,1997,48:93-106
|
被引
1
次
|
|
|
|
|
6.
Kipcak I. Removal of boron from aqueous solution using calcined magnesite tailing.
Chemical Engineering Journal,2012,189/190:68-74
|
被引
5
次
|
|
|
|
|
7.
Kissinger H E. Reaction kinetics in differential thermal analysis.
Analytical Chemistry,1957,29(11):1702-1706
|
被引
1228
次
|
|
|
|
|
8.
Liu X W. Thermal decomposition kinetics of magnesite from thermogravimetric data.
Journal of Thermal Analysis and Calorimetry,2011,107:407-412
|
被引
2
次
|
|
|
|
|
9.
Ma Guixia. Thermal decompositionand molecular structure of 5-aminotetrazolium nitrate.
Thermochimica Acta,2004,423:137-141
|
被引
6
次
|
|
|
|
|
10.
Niu Shengli. Thermogravimetric analysis of the relationship among calcium magnesium acetate, calcium acetate and magnesium acetate.
Applied Energy,2010,87:2237-2242
|
被引
10
次
|
|
|
|
|
11.
Ozawa T. Estimation of activation energy by isoconversion methods.
Thermochimica Acta,1992,203:159-165
|
被引
25
次
|
|
|
|
|
12.
Samtan M. Comparison of dolomite decomposition kinetics with related carbonates and the effect of procedural variables on its kinetic parameters.
Thermochimica Acta,2002,392/393(15):135-145
|
被引
12
次
|
|
|
|
|
13.
Turcaniova L. Stimulating the thermal decomposition of magnesite.
Thermochimica Acta,1996,277:75-84
|
被引
4
次
|
|
|
|
|
14.
陈肇友. 镁资源的综合利用及镁质耐火材料的发展.
耐火材料,2005,39(1):6-15
|
被引
6
次
|
|
|
|
|
15.
郭如新. 镁剂烟气脱硫联产硫镁肥料初探.
化工科技市场,2002(8):24-27
|
被引
1
次
|
|
|
|
|
16.
郝万晨. 菱镁建筑材料中表面活性剂的作用.
渭南师范学院学报,2002,17(5):34-35
|
被引
1
次
|
|
|
|
|
17.
胡荣族.
热分析动力学,2001:149-150
|
被引
1
次
|
|
|
|
|
18.
李环. 利用菱镁矿制备高活性氧化镁.
耐火材料,2006,40(4):294-296
|
被引
5
次
|
|
|
|
|
19.
李连会. 菱镁矿复分解法制取药用碳酸镁.
非金属矿,2010,24(4):25-27
|
被引
1
次
|
|
|
|
|
20.
沈兴.
差热、热重分析与非等温固相反应动力学,1995:124-129
|
被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问